Radeon HD 7970 and GeForce GT 620 - video card comparison
Passmark - benchmark score Radeon HD 7970 vs GeForce GT 620
Radeon HD 7970
5405
GeForce GT 620
388
Radeon HD 7970
GeForce GT 620
Architecture
GCN (2011−2017)
Fermi (2010−2014)
GPU code name
Tahiti XT
GF108
Market segment
Desktop
Desktop
Release date
December 2011
May 2012
Bus support
PCIe 2.1 x16
PCI Express 2.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
None
Boost clock speed
925 MHz
-
Core clock speed
-
700 MHz
CUDA cores
-
96
Floating-point performance
3,789 gflops
268.8 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
4,313 million
585 million
Pipelines / CUDA cores
2048
96
Power consumption (TDP)
300 Watt
49 Watt
Maximum GPU temperature
-
98 °C
Texture fill rate
118.4
11.2 billion/sec
Memory type
GDDR5
DDR3
Maximum RAM amount
6 GB
1 GB
Memory bus width
384 Bit
64 Bit
Memory clock speed
1375 MHz
1.8 GB/s
Memory bandwidth
264 GB/s
14.4 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
Dual Link DVI-I, HDMI, VGA
Multi monitor support
-
+
Eyefinity
+
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
2048x1536
DisplayPort support
-
-
Audio input for HDMI
-
Internal
DirectX
DirectX® 11
12 (11_0)
CUDA
-
+
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.6
4.2
Shader Model
5.1
5.1
Vulkan
-
N/A
3D Blu-Ray
-
+
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-